<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="../react18/react.development.js"></script>
  <script src="../react18/react-dom.development.js"></script>
  <script src="../react18/babel.min.js"></script>
  <style>
    .box {
        width: 400px;
        height: 400px;
        background-color: aquamarine;
        margin: 0 auto;
    }
</style>
</head>

<body>
  <div id="app"> </div>
  <script type="text/babel">
    /* 
      jsx语法1:
        - 虚拟DOM中要混入js表达式，要用{},{}中只能写变量或者表达式,不能书写语句(表达式有返回值,语句没有返回值)

    
    */
    const  isActive = true;
    const hot = false;
    const vDOM = (
      <div className="box">
        <h1>喜欢你</h1>
        <p style={{color:'red'}}>JSX贼方便</p>
    
        <p className={isActive?"active":""} >今天的天气真{hot?"热啊":"冷啊"}</p>
      </div>
    );


    
    //创建容器并渲染虚拟DOM
    ReactDOM.createRoot(document.getElementById('app')).render(vDOM)
  </script>
</body>

</html>